There are a couple walls that I've seen in Taichung in the past two or three months that have been marvelously painted, and I do see new stuff popping up from time to time here and there. I'm running ragged 6 days a week, though, and in getting from point A to B I have no time budgeted to stop and capture what I see to share here. I have a week's holiday or two coming to me in January, I think. I'll see what I can scrape together then.
In the meantime, check out this green graffitti in Brooklyn. It's not going to grow on me anytime soon, but I'll bet it would do well here.